CVE-2017-20240

Published: Jun 12, 2026Modified: Jun 12, 2026Deferred

5.9

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability: 2.2 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks. These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.

Related CWEs

CWE-208

Observable Timing Discrepancy

Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.

References (4)

https://github.com/arodland/Crypt-PBKDF2/pull/6

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

http://www.openwall.com/lists/oss-security/2026/06/12/3

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.